800 PROF. J. R. GREENE ON A RARE MEDUSA. [Dec. 16, 



Discomedusce Haeckel places the Chanjbdeidce, arranged under two 

 orders and five families, as follows : — 



Cosomedvbm. 



Chary bdeidae. 

 Bursaridae. 

 Chiropsalruidae. 

 Peuomedus^. 

 Periphyllidae. 

 Pericryptidse. 



Haeckel, therefore, as touching the genera Charybdea and Peri- 

 2)hylla } would seem to have reverted to the nomenclature of Fritz 

 Miiller. His work is impatiently expected, since his opportunities 

 of studying the Medusas have heen varied and extensive. The deep- 

 sea forms obtained during the voyage of the 'Challenger' have also 

 been intrusted to him. We do not know what new Chanjbdeidce 

 he has investigated, or whether he is justified in his apparently 

 extreme subdivision of this group. So copious and diversified an 

 assemblage as the Phanerocarpce will probably by most zoologists 

 continue to be regarded as of higher rank than either of the two 

 moieties of Gegenbaur's single family, notwithstanding that the 

 Charybdeida of the latter are structurally more modified aud more 

 numerous than Gegenbaur, writing in 1856, could have supposed. 



Before instituting his own researches on Charybdea, Claus 1 re- 

 viewed with care what had been done by others. While pointing 

 out a number of discrepancies, he shows the true significance of the 

 structure of these Medusae, and demonstrates their affinities with 

 great clearness. His results, critical and original, are well epitomized 

 in his ' Zoologie' 2 . He neglects many ill-defined species, and thus 

 arranges the few which have hitherto been properly described and 



figured. 



Suborder LOBOPHORA s. MARSUPIALIDA. 

 Family Charybdeida. 

 Genus Charybdea, Per. 



Ch. marsupialis, Per. & Le S. 

 Ch. kaplonemrr, Fr. Mull. 

 Genus Tamoya, Fr. Mull. 

 T. quadrumana, Fr. Mull. 



Literature of the Charybdeidce. 



Claus, C. — Untersuchungen fiber Charybdea mursupialis. Ar- 

 beiteu a. d. zoolog. Institute der Universitat Wien, 2tes Heft, 

 1878, pp. 221-2/6, mit Tafel xvih.-xxii. 



1 Studicn iiber Polypen und Quallen der Adria. I. Aealephen (Discome 

 dusen), 1877. Beprinted from ' Wiener Denkschriften,' Band xxxviii. See 

 pp. 53-60. 



2 Grundziige der Zoologie, 4te Auflage, Band i. erste Lieferung, pp. 287-289 

 (1879, but issued in 1878). 



